Traction-lug.



J, G. BROWN TRACTION LUG. APPLICATION PiLED mus, 1912. I

Patefited Nov. 4, 1913.

UNITED STATES, PATENT onion.

J. novn snown, or eno'ron, NEW YORK, AssIsNor. or ONE-HALF BACON, orGROTON, NEW YonK.

TO GEDRGE T.

iTfiAClTION-LUG.

To all whom it may concern:

Be itknown that'I, J. Gnovn BRO N, a citizen of the United States,residing at ,Groton, in the county of Tompkins and "State of New York,have invented certain new and useful Improvements in Traction Lugs,ofwhich the following is a specification.

My invention relates to traction Wheels, and more articularly to aremovable lug adapted 'to e secured tosuch'wheels-to prevent slipping.

While designed especially for use inconnection with road engines ormotor driven tractors, my invention is also applicable to driving wheelsof agricultural, excavating, or harvesting machinery.

The nature, ob ects, and advantages of 'the invention will fully appearfrom the following specification, reference being bad to theaccompanying drawings forming a part thereof, and in which Fi ure 1 isa. side elevation of a complete whee equipped with my improved tractionlugs; Fig. 2 is an edge view thereof. Fig. 3 is a plan view, on anenlarged scale, of one of the lugs detached. Fig. 4 is a section takenon the line 4-4 of Fig. 3. Fig. 5 is a transverse section through thelug on the line- 5-5 of Fig. 3, 'the'wheel rim being also shown, andFig. 6 is a sectional view on the same scale, such section being takenon the line 6-6 of Fig. 2, lookingin the direction of the arrow.

Referring to the drawings in detail, 1 designates a wheel rim to whichare secured the usual spokes 2, terminating at the center in. the hub 3.The rim 1 is preferably in the nature of a continuous flat band, asclearly shown in Figs. 5 and 6. To the rim 1 are secured a series of myimproved traction lugs designated in their entirety by the referencenumeral 4;, and held in posltion by means of central bolts 5, as here-'inafterdescribed.

Referring particularly to Fig. 3, it will be seen that my improved lugcomprises a transverse rib 6, and a longitudinal rib 7, arrangedsubstantially at right angles to each other, and connected at theirpoint of intersection by a circular boss 8. The ribs are also connectedand braced by means of a comparatively thin web 9, which is adapted tolie snugly.against the rim as shown in Fig. 6. I

In the boss 8 -is formed a countersunk Specification of Letters Patent.

Application filed July 6, 1912. SerialNo:708,042.

-lug., As shown in the Patented'Nov. 4,193.3.

opening 10,ad apted to receive the head of a bolt such as 5, andextending through the lug from the countersunk opening 10 is a. hole 11,preferably made ,square, and adapted to bolt, as indicated at'b, in Fig.5. The shank of the bolt is circular as usual, and entends through asimilar opening in the IlHl 1,,the bolt and lug being held in place bythe ,nut 15 Referring again to'Fig. 3, it will be'seen that I provideinterlocking means at the ends of the'longitudinal-rib of my improveddrawings one end of this rib is bifurcated as indicated at 12,; and thewalls of the bifurcated portion are preferably under-cut as indicated at13, such under-cut walls being adapted to form a dovetailed joint withthe similarly shaped end 14 of the next adjacent lug. It' will beobserved thatbut a single bolt is required to secure each lug in place,the lugs being held in position and prevented from becoming angularlydisplaced by virwe of the interlocking arrangement above described. Thissingle bolt feature very much simplifies the construction andfacilitates removing and replacing thelugs as 00- casion may require. Itwill be further noted that the heads of the bolts 5 are. flush with theupper surface'of the ribs and that the longitudinal ribs 7 abut so as toform a continuous circumferential fin, which serves to prevent sideslipping. The, lugs are each curved in the direction of the length ofthe rib 7, as indicated in Fig. i, so as to conform to the shape of thewheel, and it will therefore be seen, from an inspection of Figs. 1 and2, that the ribs 7, constitute a continuous unbroken smooth tread forthe wheel. This is very desirable to prevent excessive jolting when thewheel rolls-upon a hard surface into which the ribs cannot bite, as forexample a pavement. It will be thus seen that I have provided a readilydetachable traction lug which affords an effective gripping action bothagainst slipping and against side thrust, and at the same timeconstitutes a smooth rolling surface or tread for use on hard roads, andit is thought that the many advantages of my invention will be readilyappreciated without further discussion. 7

What I claim is 1. A. removable traction lug ccmprising a receive asquare shoulder on the i other end being formed to fit such bifurvidedwith but a single fastening device, whereby it may be individuallysecured upon a wheel.

l. The combination with the rim of a Web, a central boss projectingoutwardly therefrom, said boss having an opening formed therein, andlongitudinal and transverse ribs radiating from-said boss and projectingoutwardly from said web.

A removable traction lug comprising a web, a central boss andlongitudinalt and transverse ribs all projecting outwardly from saidweb, and'all being of the same,- height, said boss having a bolt holeextending therethrough, the outer end of said hole being countersunk.

A traction lug comprising a web, longitudinal and transverse ribsprojecting outwardly from said web, one end of said longitudinal ribbeing bifurcated, and the independently secured thereto, each lugcomprising transverse and lon 'itu dinal ribs disposed substantially atrig t angles to each other and projecting radially beyond the wheel rim,said longitudinal ribs being constructed to interlock and placed end toend'to forma continuous smooth circumferential fin or tread.

In testimony whereof I affix my signature, in presenceof two witnesses.

. J. GROVE- BROWN.

cation, the construction being such that two Witnesses: similar lugs areadapted to interlock, when '13. L. BUCK, placed end to end, and each lugbeing prol -W. E. GABEL.

l traction wheel, of a series if removable lugs I

